HOSTAPD source code compilation and configuration

HOSTAPD is a Wi-Fi hypervisor under Linux

Download HOSTAPD Source code

First need to download HOSTAPD source code from the official website, there are two ways

One is to get HOSTAPD's latest development version from the official Git repository.

git clone git://w1.fi/srv/git/hostap.git
cd hostap/hostapd

The second is to download a stable version from the official website, http://w1.fi/hostapd/

 
wget http://w1.fi/releases/
wget http://w1.fi/releases/hostapd-2.6.tar.gz
tar xzvf hostapd-2.6.tar.gz
cd hostapd-2.6/hostapd
-2.6.tar.gz tar xzvf hostapd-2.6.tar.gz cd hostapd-2.6/hostapd

Then we need to configure HOSTAPD so that it can get support for nl80211 drivers. Copy the Deconfig file in the HOSTAPD directory to. config and edit it.

 
cp defconfig .config
vi .config

Find the following line, remove the # comment

#CONFIG_DRIVER_NL80211 =y

You can then compile the HOSTAPD.

Make

During the compilation process, we may encounter several problems

Question 1:

driver_nl80211.c:21:31: warning: netlink/genl/genl.h: No such file or directory
driver_nl80211.c:22:33: warning: netlink/genl/family.h: No such file or directory
driver_nl80211.c:23:31: warning: netlink/genl/ctrl.h: No such file or directory
driver_nl80211.c:24:25: warning: netlink/msg.h: No such file or directory
driver_nl80211.c:25:26: warning: netlink/attr.h: No such file or directory

Workaround:

Installing the LIBNL and LIBSSL libraries

sudo Install linssl-dev libnl-3-dev

If you still have a problem, edit the. config file, remove the comment from the following statement, and make again.

#CONFIG_LIBNL32 =y

Configure HOSTAPD

In the downloaded HOSTAPD directory there is a default profile hostapd.conf, but too many configurations, for beginners is not very good understanding, we first create a simple configuration file hostapd-minimal.conf, the HOSTAPD function to verify.

Edit hostapd-minimal.conf File

 
#wlan0 is your wireless network card name
interface=wlan0
driver=nl80211
ssid=test
hw_mode=g
channel=1

After the configuration is complete, you can use the command to try to turn on HOSTAPD

./hostapd./hostapd-minimal.conf

You may encounter the following error

 
Configuration file: hostapd-minimal.conf
nl80211: Could not configure driver mode
nl80211: deinit ifname=wlp9s0b1 disabled_11b_rates=0
nl80211 driver initialization failed.
wlp9s0b1: interface state UNINITIALIZED->DISABLED
wlp9s0b1: AP-DISABLED 
hostapd_free_hapd_data: Interface wlp9s0b1 wasn‘t started

This is because there are other network programs that occupy the wireless card interface, you must first shut down the system itself wireless network management Program

 
sudo nmcli radio wifi off
sudo rfkill unblock wlan
sudo ifconfig wlan0 192.168.1.1/24 up

And then open HOSTAPD. As shown below, you have successfully launched the HOSTAPD

 
Configuration file: hostapd-minimal.conf
Using interface wlp9s0b1 with hwaddr 68:94:23:8b:88:a3 and ssid "test"
wlan0: interface state UNINITIALIZED->ENABLED
wlan0: AP-ENABLED 

Next use the mobile phone to connect WiFi, found that can search the WiFi signal, but the phone is not connected. This is because the computer does not have DHCP and routing capabilities. Next, I'll install the DHCP-related program to configure software routing.

HOSTAPD source code compilation and configuration